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  <title>刷新输出缓冲区，将其作为字符串返回并关闭输出缓冲区</title>
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    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="ref.outcontrol.html">Output Control 函数</a></li>
    <li>刷新输出缓冲区，将其作为字符串返回并关闭输出缓冲区</li>
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  <div id="layout-content"><div id="function.ob-get-flush" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ob_get_flush</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">ob_get_flush</span> &mdash; <span class="dc-title">刷新输出缓冲区，将其作为字符串返回并关闭输出缓冲区</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.ob-get-flush-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>ob_get_flush</strong></span>(): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>ob_get_flush()</strong></span> 刷新输出缓冲区，将其作为字符串返回并关闭输出缓冲。
  </p>
  <p class="para">
   输出缓冲区比由带有 <a href="outcontrol.constants.html#constant.php-output-handler-flushable" class="link">PHP_OUTPUT_HANDLER_FLUSHABLE</a>
   flag 的 <span class="function"><a href="function.ob-start.html" class="function">ob_start()</a></span> 启动。否则 <span class="function"><strong>ob_get_flush()</strong></span> 将不起作用。
  </p>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <span class="simpara">
    此函数与 <span class="function"><a href="function.ob-end-flush.html" class="function">ob_end_flush()</a></span> 相似，不同的是此函数会把缓冲区作为字符串返回。    
   </span>
  </p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.ob-get-flush-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ob-get-flush-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回输出缓冲区的内容或者没有缓冲区激活时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.ob-get-flush-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-538">
    <p><strong>示例 #1 <span class="function"><strong>ob_get_flush()</strong></span> 示例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;使用&nbsp;output_buffering=On<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">ob_list_handlers</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">//&nbsp;保存缓冲区到文件<br /></span><span style="color: #0000BB">$buffer&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ob_get_flush</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">file_put_contents</span><span style="color: #007700">(</span><span style="color: #DD0000">'buffer.txt'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$buffer</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">ob_list_handlers</span><span style="color: #007700">());<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Array
(
    [0] =&gt; default output handler
)
Array
(
)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ob-get-flush-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.ob-end-clean.html" class="function" rel="rdfs-seeAlso">ob_end_clean()</a> - 清空（擦除）缓冲区并关闭输出缓冲</span></li>
    <li class="member"><span class="function"><a href="function.ob-end-flush.html" class="function" rel="rdfs-seeAlso">ob_end_flush()</a> - 冲刷出（送出）输出缓冲区内容并关闭缓冲区</span></li>
    <li class="member"><span class="function"><a href="function.ob-list-handlers.html" class="function" rel="rdfs-seeAlso">ob_list_handlers()</a> - 列出所有使用的输出处理程序</span></li>
   </ul>
  </p>
 </div>
 

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